Rachel Bilson

Most famous for her role as Summer Roberts on the FOX teen drama The O.C., California native Rachel Bilson has successfully transitioned into a film career, appearing in projects like 2006's The Last Kiss and 2008's Jumper.

Born August 25, 1981, Bilson is also a spokesperson for Bongo Jeans, but is most noted for her relationship with O.C. costar Adam Brody, which ended after three years in 2006. She was once engaged to her Jumper costar Hayden Christensen, though the pair called things off in August 2010.

Bilson -- who's BFFs with Kate Bosworth -- has turned down requests to appear nude in men's magazines, specifying that she feels that her body "is sacred."